3 |
sin10° |
cos10° |
3 |
sin10°?
| ||
cos10° |
2sin(10°?60°) |
cos10° |
2sin50° |
cos10° |
∴(tan10°-
3 |
cos10° |
sin50° |
2sin50° |
cos10° |
cos10° |
sin50° |
故答案為:-2
3 |
cos10° |
sin50° |
3 |
sin10° |
cos10° |
3 |
sin10°?
| ||
cos10° |
2sin(10°?60°) |
cos10° |
2sin50° |
cos10° |
3 |
cos10° |
sin50° |
2sin50° |
cos10° |
cos10° |
sin50° |